Global Patent Index - EP 0370670 A3

EP 0370670 A3 19940126 -

Publication

EP 0370670 A3 19940126

Application

EP 89311714 A 19891113

Priority

JP 29527088 A 19881122

Abstract (en)

[origin: EP0370670A2] A video tape recording apparatus having a tape guide drum with a cylindrical outer surface for guiding a magnetic tape in a helical fashion on the outer surface, and a pair of rotary magnetic heads rotating at a predetermined speed and provided in association with the tape guide drum for scanning skewed parallel tracks on the magnetic tape is specially adapted to perform after-recording or dubbing. Each of the tracks is formed having a length to accommodate a pair of audio portions and a centre video portion provided between the pair of audio portions. Rotational angles of the rotary magnetic heads corresponding to the length of the audio portions and the centre video portion are expressed as follows, theta a + theta v = theta b + theta v = 180<o> where theta a and theta b correspond to the audio portions and theta v corresponds to the centre video portion, respectively. In the case of audio after-recording, selected audio portions are left blank during the initial recording operation and an after-recording audio signal is recorded therein at a late time.

IPC 1-7

G11B 27/029; G11B 15/18

IPC 8 full level

G11B 5/008 (2006.01); G11B 15/18 (2006.01); G11B 27/024 (2006.01); G11B 27/029 (2006.01)

CPC (source: EP KR US)

G11B 5/52 (2013.01 - KR); G11B 15/1875 (2013.01 - EP US); G11B 27/024 (2013.01 - EP US); G11B 27/029 (2013.01 - EP US); G11B 2220/90 (2013.01 - EP US)

Citation (search report)

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

EP 0370670 A2 19900530; EP 0370670 A3 19940126; CA 2003195 A1 19900522; JP H02141901 A 19900531; KR 900008449 A 19900603; US 5121259 A 19920609

DOCDB simple family (application)

EP 89311714 A 19891113; CA 2003195 A 19891117; JP 29527088 A 19881122; KR 890016874 A 19891121; US 43443189 A 19891113